A 3 tesla superconducting solenoid for the AMY particle detector at TRISTAN

A high field superconducting solenoid for the AMY particle detector at the TRISTAN storage ring at KEK was designed and constructad. It consists of an 8 layer superconducting solenoidal coil placed in s thick hexagonal iron return yoke. The solenoid has a 2.39 m inner coil diameter and is 1.54 m in overall length with a radial thickness of 0.1 m. The design current and field at the center are 5000 A and 3 T, respectively. The stored energy in the field is 40 MJ. Initial magnet test data are given.